| Name | CVE-2021-41159 |
| Description | FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. All FreeRDP clients prior to version 2.4.1 using gateway connections (`/gt:rpc`) fail to validate input data. A malicious gateway might allow client memory to be written out of bounds. This issue has been resolved in version 2.4.1. If you are unable to update then use `/gt:http` rather than /gt:rdp connections if possible or use a direct connection without a gateway. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1001061 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| freerdp2 (PTS) | buster | 2.0.0~git20190204.1.2693389a+dfsg1-1+deb10u2 | vulnerable |
| buster (security) | 2.3.0+dfsg1-2+deb10u4 | vulnerable |
| bullseye | 2.3.0+dfsg1-2+deb11u1 | vulnerable |
| bookworm | 2.10.0+dfsg1-1 | fixed |
| trixie | 2.11.2+dfsg1-1 | fixed |
| sid | 2.11.5+dfsg1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| freerdp | source | (unstable) | (unfixed) | | | |
| freerdp2 | source | (unstable) | 2.4.1+dfsg1-1 | | | 1001061 |
Notes
[bullseye] - freerdp2 <no-dsa> (Minor issue)
[buster] - freerdp2 <ignored> (Patch is too instrusive to backport)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-vh34-m9h7-95xq
https://github.com/FreeRDP/FreeRDP/commit/d39a7ba5c38e3ba3b99b1558dc2ab0970cbfb0c5 (Stable 2.0 backports)
The RFC gateway parsing code has been completly refactored, backporting to 2.3.x is not feasible.
https://github.com/FreeRDP/FreeRDP/commit/f0b44da67c09488178000725ff9f2729ccfdf9fe